CNMAC(4) Device Drivers Manual (evbmips) CNMAC(4)

cnmacCavium OCTEON gigabit Ethernet driver

cnmac* at octgmx?

The cnmac driver supports gigabit Ethernet interfaces on the Cavium OCTEON Plus CN50xx and Cavium OCTEON III CN71xx systems.

It presently provides IPv4/TCP/UDP checksumming on reception only. It also supports VLAN-sized frames.

arp(4), atphy(4), ifmedia(4), netintro(4), vlan(4), ifconfig(8)

The cnmac driver first appeared in NetBSD 8.0.

The cnmac driver was written for NetBSD by Internet Initiative Japan Inc.

February 7 2026 NetBSD 11.99